Home CMMG CMMG Mk-W “Anvil” .458 SOCOM AR15 Review

CMMG Mk-W “Anvil” .458 SOCOM AR15 Review

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As previously reported, CMMG sent James a pre-production model of the CMMG Anvil for review. James took the Anvil out on several range trips over a month-long period and fired around fifteen boxes of various ammunition through the Anvil without any cleaning. In this overview, James discusses what the Anvil is, how it was engineered, and tries to answer the question “why .458 SOCOM?” Enjoy the review.

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25 COMMENTS

  1. "the 458 is a versatile round"….. sooooo….. "Hey Guys, lets completely re-engineer the AR-15, destroy its compatibility with any other rifle, essentially making this NOT an AR-15 with a bastardized AR-10 lower, even though the 458 was specifically designed for the AR-15 platform" "Brilliant, Dave!!" If you're going AR-10 – why aren't we using a 45 Raptor? Same Bullet diameter so the bullet offerings are the same. If you're going 458 socom, you're absolutely going to be reloading – so that's basically a zero sum with the slim availability of loaded 45 raptor cartridges.

  2. It's the Underwood loaded Lehigh Defense Extreme Penetrator projectile. Nothing expands in that projectile. Dude! 05:08 and again at 06:21 why are the gases Red? is that poly case Ruger stuff disintegrating right out of the barrel? It looks like it's falling apart or vaporizing before it makes it down range lol

  3. James, to confirm, you did say the Anvil has a standard charging handle; as opposed to the proprietary charging handle used on the CMMG Mutant? If so, that's great news! I was going to buy this gun, anyway; but that feature makes this gun a perfect 10 for me.

  4. The lack of knowledge in this video and comments is amazing. The CMMG 458 is a waste of money. You can get into the 458 for around $3-400 by just getting a barrel and bolt. There is no need for a beefed up receiver that is not compatible with other AR's. The 458 was designed for the standard AR15 platform. CMMG's claim that a reamed 5.56 bolt face is weak is incorrect. This round has been around a long time and 458 bolts out there are doing just fine. $500 will build you a complete upper easily. I did just that to use mine for hunting instead of hauling a heavy 308 into the woods. Regular Lancer mags work fine. You dont need one with a 458 logo.

  5. Great video! Three questions about it though.

    (rifle)
    1. that twist rate, what kind of accuracy did the rifle perform?

    (rounds&rifle)
    2. The colorful smoke, was there additional fowling from the poly-carbonate rounds?

    (rounds)
    3. Were the poly-carbonate rounds staying intact or was there spatter on the targets from them?

  6. No target plinker here, I cannot see practical application, outside of someone feeling that there .30 to .45 caliber hog gun isn't a enough firepower already. If someone gave it to me, okay, if someone was funding the ammunition for it okay. This thing will never work in a ban state, such as California, you will have a three round magazine max, so why not just carry a .45-70, lever gun.

  7. I'll probably never buy one based solely on price, but I'd love to try one. I see the potential, but for that price I'd rather just upgrade my optics for my hunting rifle instead. I've never even heard of any local gun store having the ammo, and I ask after weird am munitions all the time. Lots of weird caliburs in use all over and asking about them lets you meet folks with some really cool rifles. Those high velocity shells are intriguing, I'd be happy to see how they fair shooting next to a 7mm or .270 size.

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